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VulnerabilityPublished

CVE-2026-123862: nodejs node · Uncaught Exception

Affects nodejs nodeSource CVE Database V5

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Not known to be exploited · CVSS 2.9 Low · fixed in 26.13.1 : update nodejs node when convenient.

Data as of 11 Nov 2026, 18:35 UTC

CVSS 3.0 base score
2.9Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (openjs)CVSS 3.02.9
Patch
Available – fixed in 26.13.1, 24.22.3, 22.23.5
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade nodejs node to 26.13.1, 24.22.3 or 22.23.5.

Affected software

ProductAffectedFixed in
nodejsnodeAffected
  • >=25.0.0 <26.13.1
Fixed in
  • 26.13.1
nodejsnodeAffected
  • >=23.0.0 <24.22.3
Fixed in
  • 24.22.3
nodejsnodeAffected
  • <22.23.5
Fixed in
  • 22.23.5

AI-suggested

Upgrade Node.js to fixed versions 22.23.5, 24.22.3, or 26.13.1 as appropriate. These versions contain the official fix for this issue. No additional mitigation is required if upgrading is performed.

Description

CVE-2026-123862 is a low-severity vulnerability in Node.js versions 22.x, 24.x, and 26.x where an uncatchable exception can occur in the zlib streaming API. This happens when a peer disconnects during data compression using deflate.params(), causing an internal assertion failure that terminates the process. The issue arises because the stream's native handle is destroyed but the callback asserts its existence, leading to a process crash. This affects applications that call deflate.params() while streaming to a peer, which is uncommon.

References

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